A term for a sub-genre of jungle or drum and bass music. Characterised by solid, 'warm' basslines, the use of kick drums (often absent from jungle), and repeated loops. Rollers are crafted for maximum danceability, and are in many ways the natural progression of ragga. The roller style can be contrasted to the hardstep and intelligent styles by the use of danceabledrum loops (with flourishes and a gradual evolution of the breakbeat) instead of variation and change in the groove for its own sake.

Any one of numerous species of Old World picarian birds of the family Coraciadae. The name alludes to their habit of suddenly turning over or "tumbling" in flight.

⇒ Many of the species are brilliantly colored. The common European species (Coracias garrula) has the head, neck, and under parts light blue varied with green, the scapulars chestnut brown, and the tail blue, green, and black. The broad-billed rollers of India and Africa belong to the genus Eurystomus, as the oriental roller (E. orientalis), and the Australian roller, or dollar bird (E. Pacificus). The latter is dark brown on the head and neck, sea green on the back, and bright blue on the throat, base of the tail, and parts of the wings. It has a silvery-white spot on the middle of each wing.

Ground rollerZool., any one of several species of Madagascar rollers belonging to Atelornis and allied genera. They are nocturnal birds, and feed on the ground. -- Roller bolt, the bar in a carriage to which the traces are attached; a whiffletree. [Eng.] -- Roller gin, a cotton gin inn which rolls are used for separating the seeds from the fiber. -- Roller mill. See under Mill. -- Roller skate, a skate which has small wheels in the place of the metallic runner; -- designed for use in skating upon a smooth, hard surface, other than ice.